The top Republican and Democrat on the Senate Armed Services Committee requested an investigation Thursday into how Trump ...

The Trump administration's use of a popular app to discuss sensitive military plans is raising questions about security and ...

Government and military officials handle classified discussions within SCIF rooms to safeguard top-secret information from ...

Top Trump officials are facing a firestorm after using the commercially available app Signal to discuss a U.S. military ...

Here's what we know about whether officials shared classified intel in leaked group chat that included the editor-in-chief of The Atlantic.

Days after the editor-in-chief of The Atlantic revealed that he had been accidentally included in a group chat with many of ...

A man in Northern England said he had stumbled upon hundreds of documents, including threat assessments, armory codes and ...

Lawmakers are demanding answers after Trump-era officials used the Signal app to discuss military strikes. A federal judge ...

White House national security adviser Mike Waltz, left, speaks with Secretary of Defense Pete Hegseth as President Donald ...

Republican and Democratic leaders on the Senate Armed Services Committee are requesting a formal investigation into the ...

Under questioning from senators, the C.I.A. chief and the director of national intelligence pointed to the defense secretary ...

The defense secretary’s handling of sensitive information is under criticism after he shared details about a strike on Houthi ...